Congratulations on joining team pink! That is awesome. Don't worry too much about measuring behind. After 20 weeks, genetic factors come into play that don't show up prior to the 1/2 way mark. My kids always measured a month ahead of their EDD at 20 weeks because their heads were so dang big. The measurements didn't actually indicate a change in gestational age or a need to change my due date. If you or your DH are smaller, or you have smaller babies, your baby may just be showing those characteristics. Did the tech/nurse seem worried? I'm sending healthy baby prayers your way. I hope Oct comes quickly for you